This book provides a detailed account of the theory and practice of quantum
cryptography. Suitable as the basis for a course in the subject at the graduate
level, it crosses the disciplines of physics, mathematics, computer science and
engineering. The theoretical and experimental aspects of the subject are derived
from first principles, and attention is devoted to the practical development of
realistic quantum communications systems. The book also includes a comprehensive
analysis of practical quantum cryptography systems implemented in actual
physical environments via either free-space or fiber-optic cable quantum
channels. This book will be a valuable resource for graduate students, as well
as professional scientists and engineers, who desire an introduction to the
field that will enable them to undertake research in quantum cryptography. It
will also be a useful reference for researchers who are already active in the
field, and for academic faculty members who are teaching courses in quantum
information science. In addition, much of the material will be accessible to
those senior undergraduates who have the requisite understanding of quantum
mechanics.